Endoscopic treatment device, and usage method thereof

Abstract

A tissue traction device includes a first needle connected to a distal end of a first thread; a second needle connected to a distal end of a second thread; an elongated main body connected to the first thread and extending between the first thread and the second thread, the main body including a first hole; and a tube disposed at a proximal end of the main body, wherein the second thread is inserted through the first hole to be advanceable and retractable at a position between the second needle and a distal end of the tube, and the tube and the second thread are configured to be relatively movable in a longitudinal direction of the tube.

What is claimed is: 
     
         1 . A tissue traction device, comprising:
 a first needle connected to a distal end of a first thread;   a second needle connected to a distal end of a second thread;   an elongated main body connected to the first thread and extending between the first thread and the second thread, the main body including a first hole; and   a tube disposed at a proximal end of the main body,   wherein the second thread is inserted through the first hole to be advanceable and retractable at a position between the second needle and a distal end of the tube, and   the tube and the second thread are configured to be relatively movable in a longitudinal direction of the tube.   
     
     
         2 . The tissue traction device according to  claim 1 , wherein the main body is connected to a proximal end of the first thread, and the main body extends between the proximal end of the first thread and a proximal end of the second thread. 
     
     
         3 . The tissue traction device according to  claim 1 , wherein part of the second thread is inserted into the tube from a distal end portion of the tube and goes out from a proximal end portion of the tube. 
     
     
         4 . The tissue traction device according to  claim 1 , wherein the main body is bent in an arc shape. 
     
     
         5 . The tissue traction device according to  claim 1 , wherein the tube includes a second hole, and the second thread is inserted in the second hole to be advanceable and retractable. 
     
     
         6 . A tissue traction device, comprising:
 a first thread;   a second thread;   an elongated main body connected to the first thread and extending between the first thread and the second thread, the main body including a first hole; and   a tube disposed at a proximal end of the main body,   wherein each of the first thread and the second thread includes a ring-shaped portion,   the ring-shaped portion of the first thread protrudes from the main body,   the ring-shaped portion of the second thread protrudes from the tube,   the second thread is inserted through the first hole to be advanceable and retractable at a position between the ring-shaped portion of the second thread and a distal end of the tube, and   the tube and the second thread are configured to be relatively movable in a longitudinal direction of the tube.   
     
     
         7 . The tissue traction device according to  claim 6 , wherein the main body is connected to a proximal end of the first thread, and the main body extends between the proximal end of the first thread and a proximal end of the second thread. 
     
     
         8 . The tissue traction device according to  claim 6 , wherein part of the second thread is inserted into the tube from a distal end portion of the tube and goes out from a proximal end portion of the tube. 
     
     
         9 . The tissue traction device according to  claim 6 , wherein the main body is bent in an arc shape. 
     
     
         10 . The tissue traction device according to  claim 6 , wherein the tube includes a second hole, and the second thread is inserted in the second hole to be advanceable and retractable. 
     
     
         11 . The tissue traction device according to  claim 6 ,
 wherein the first thread is inserted through the tube to be advanceable and retractable,   the first thread protruding from the distal end of the tube is inserted through the main body to be advanceable and retractable between the ring-shaped portion of the first thread and the distal end of the tube.   
     
     
         12 . A usage method of a tissue traction device including a first thread, a second thread, and a tube, comprising:
 fixing the first thread to a first fixation site of a luminal organ;   fixing the second thread to a second fixation site of the luminal organ;   forming an opening by resecting tissues between the first fixation site and the second fixation site;   relatively moving the tube and the second thread to increase a distance between the first fixation site and the second fixation site so as to elongatedly stretch the opening, and   performing treatment to surrounding tissues and closing the opening.   
     
     
         13 . The usage method of a tissue traction device according to  claim 12 , wherein the first thread is fixed to the first fixation site after forming the opening. 
     
     
         14 . The usage method of a tissue traction device according to  claim 12 , wherein the opening is formed after fixing the first thread to the first fixation site.